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प्रश्न
A body of mass 60 kg has the momentum 3000 kgm/s-1. Calculate: the speed of the body.
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उत्तर
Mass of body = 60 kg
Momentum, p=3000 kgm/s
Momentum = mass x velocity
3000 = 60 x velocity
Velocity =50 m/s
संबंधित प्रश्न
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A sailboat is moving due to wind energy.
Write the formula for work done on a body when the body moves at an angle to the direction of force. Give the meaning of each symbol used.
A person of mass 50 kg climbs a tower of height 72 metres. Calculate the work done. (g = 9.8 m s−2).
Complete the following sentences:
1 H.P. = ........ W.
Name the physical quantity associated with the 'rate of doing work'.
What should be the characteristic of a source of energy?
What is work?
